update mobile app apple store link (#161)

Author: filipslezaklab

web/src/shared/links.ts

@@ -2,7 +2,7 @@ export const sharedLinks = {
   client: {
     download: {
       android: 'https://play.google.com/store/apps/details?id=net.defguard.mobile',
-      ios: 'https://testflight.apple.com/join/Jvdhkt7h',
+      ios: 'https://apps.apple.com/us/app/defguard-vpn-client/id6748068630',
       desktop: 'https://defguard.net/download/',
     },
   },